On 3/25/19 10:18 AM, Stephen John Smoogen wrote: > On Mon, 25 Mar 2019 at 13:07, Miro Hrončok <mhroncok@xxxxxxxxxx> wrote: >> >> On 13. 03. 19 15:30, Stephen John Smoogen wrote: >>> Over the last 5 days, Troy Dawson, Jeroen van Meeuwen, Carl W George, >>> and several helpers have gotten nearly all of the python34 packages >>> moves over to python36 in EPEL-7. They are being included in 6 Bodhi >>> pushes because of a limitation in Bodhi for the text size of packages >>> in an include. >>> >>> The current day for these package groups to move into EPEL regular is >>> April 2nd. We would like to have all tests we find in the next week or >>> so also added so that the updates can occur in a large group without >>> too much breakage. >> >> A problem was pointed out in >> https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-f2d195dada#comment-914787 >> >> If you have 3rd party software using /usr/bin/python3 and you have python34 >> installed, updating your system will remove that symlink and your software breaks. >> >> However we cannot obsolete python34 form python36, because that breaks software >> that actually wants and uses /usr/bin/python3.4 and possibly make python34 >> uninstallable (not sure). >> >> So arguably, the update should update both python34 and install python36, >> keeping both Pythons available, the user/admin could than remove the one that is >> not needed. >> >> AFAIK The only thing that would make this happen is to require python36 from >> python34. And that seems like a huge ugly workaround with unwanted side affects. >> > > Here is a hair-brained idea. have them both require > python3-versioned-command which puts in the alternatives logic and > sets it to 1 of 3 options? > 1. python34 > 2. python36 > 3. you didn't install a python silly I think that could be confusing (not that the alternatives are much else. ;) But we talked about this a lot on IRC. Just make python36 obsolete the old version of python34 that had /usr/bin/python3. This causes yum to install the new python34 and pull in python36 for /usr/bin/python3. It does mean people with 3rd party software are now using python36 instead of 34, but if they only speficied /usr/bin/python3, it should just run with any python3 version right? kevin
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